Door-operating mechanism.



. A. BITTER.

DOOR OPERATING MECHANISM. APPLICATION FILED JULY 12. 1909.

952,? 1 8 Patented Mar. 22, 1910.

ADAM BITTER, OF CINCINNATI, OHIO, ASSIGNOR TO THE BITTER FOLDING DOORCOMPANY, OF COVINGTON, KENTUCKY, A CORPORATION OF KENTUCKY.

DOOR-OPERATING MECHANISM.

Application filed July 12,

Specification of Letters Patent.

Patented Mar. 22, 1910.

1909. Serial No. 507,196.

To all whom it may concern;

Be it known that I, ADAM BITTER, a citizen of the United States,residing at Cincinnati, in the county of Hamilton and State of Ohio,have invented certain new and useful Improvements in Door-OperatingMechanism, of which the following is a specification.

My invention relates to improvements in mechanism for opening, closingand counterweighting heavy doors.

One of its ob ects is to provide mechanism 5 capable of ready andconvenient assembly, and access.

Another object is to provide inexpensive mechanism of minimum parts.

It further consists in certain details of form, combination andarrangement, all of which will be more fully set forth in thedescription of the accompanying drawings, in which:

Figure 1 is a front elevation of my improved mechanism in position foruse. Fig. 2 is a top plan view of the same. Fig. 3 is a vertical sectionon line 4) o of Fig. 1. Fig. 4 is a perspective view of one of thejournal pins or shafts.

My adapted for use with the class of doors illustrated No. 856,369,granted June 11, 1907, but is capable of use in connection with otherdoors, and for like purposes.

In the form illustrated in the drawings, A B represent sprocket chainsattached at one end to opposite sides of the lower portion of the doorto be operated. At the opposite end chains A B are preferablyi jointlyattached to a counterweight 0, although independent weights may beemployed in place of a joint weight. chain A passes first over an idlepulley a and thence over a sprocket wheel D and thence to thecounterweight C. Chain B 2 passes from the door directly over sprocketwheel D and thence to counterweight C.

The sprocket wheels D D and a spur gear E are all rigidly mounted uponcl which is supported and journaled at opposite ends in sockets orbearings f 7 formed in the frame or bracket F. The bearings f f areclosed at the ends to limit the endwise movement of shaft (Z, but areopen at the top so that said shaft and its gears D D E may be droppedinto position and lifted improved mechanism is particularly in LettersPatent of the United States i The 3 a stud shaft E out as desired. Ipreferably rigidly attach the wheels D D to the shaft d by a pin or key,or by a drive fit, and provide a clutch member on the hub of the wheel Dto interlock with a clutch member 6 on the hub of the gear E to lock thegear E to the wheels i D D, as I am thus enabled to readily substitutetransmitting gears of different ratio 1 on the respective shafts,depending upon the weight or size of the door or other object 1 to beactuated.

A shaft G is adapted to be inserted endthe bracket F. Shaft G isprovided at one end with a clutch member g preferably formed integraltherewith and is provided with a key seat 9* to receive a key 9. Asprocket wheel H having a counterpart g of the clutch g formed in itshub is located in front of the bracket F. The key 9' serves to look aspur gear K to shaft G, and a pin is serves to hold the shaft G in placein its bearings f F, and to hold the clutch members g g in engagementand the gear K in engagement with its key g and thereby locked to shaftG.

L represents a sprocket chain adapted to be operated by hand and bymeans of which the sprocket wheel H may be turned. The wheel H throughshaft Gr turns spur gear l K which is inmesh with and turns spur gear Ecarrying with it wheels D D to feed the chains A B in either directionto open or close the door to which said chains are to 1 be attached.

M represents a guide or guard for the chain L to hold the same in placeupon the wheel H, guide M being attached to the front of bracket F.

I am thus enabled to lift out and readily secure access to the parts D DE, (Z, and their bearings f f, and by removing pin is I to detach andsecure access to parts G, H, K and bearings f f and to quickly andsecurely assemble said several parts as required, and to greatly reducethe first cost,

and the time required in assembling.

The mechanism herein illustrated and described is capable ofconsiderable modification without departing from the principle of myinvention.

Having described my invention what I claim is:

1. In a mechanism of the character indit cated, a supporting frame, adriven shaft detachably supported in bearings in the upper portion ofsaid frame, a chain driving pulley and a transmitting gear carriedrigidly by said shaft, a driving shaft journaled near opposite ends inbearings in the lower portion of said frame, a clutch member carried bysaid driving shaft, a driving pulley carried by said driving shaft andhaving a clutch member adapted to interlock with the clutch member ofsaid driving shaft, a trans gear carried by said driving shaft inmitting position to engage and drive the transmitting gear on saiddriven shaft, and means to detachably lock said driving shaft toposition endwise to hold said clutch members in engagement, and to holdthe transmitting gear carried by said driving shaft laterally inposition.

2. In a mechanism of the character described, a supporting frame, adriven shaft supported at opposite ends in bearings in the upper portionof said frame, a plurality of chain driving pulleys and a transmittinggear carried rigidly by said shaft, bearings in the lower portion ofsaid frame, a driving shaft adapted to be inserted endwise into saidbearings, a clutch member carried by said driving shaft, a drivingpulley carried by said driving shaft and having a clutch member adaptedto interlock with the clutch member of said driving shaft, atransmitting gear carried by said driving shaft in position to drive thetransmitting gear on said driven shaft, and means to detachably locksaid driving shaft to position endwise to hold said clutch members inengagement and to hold the transmitting gear carried by said drivingshaft laterally in position.

3. In a mechanism of the character described, a supporting frame, adriven shaft supported at opposite ends by socket shaped bearingscarried by said frame, and adapted to be lifted from and inserted intosaid bearings, a plurality of chain driving pulleys and a transmittinggear carried rigidly by said shaft, bearings in said frame adapted toreceive endwise a driving shaft, and to support opposite ends thereofsaid driving shaft carrying a driving pulley and a trans mitting gear,said transmitting gear being detachably connected to said driving shaftintermediate of its bearings, and in engagement with the transmittinggear on said driven shaft, and means to lock said driving shaft againstendwise displacement.

4. In a mechanism of the character de scribed, a supporting frame, adriven shaft supported at opposite ends in cup shaped bearings carriedby said frame, and adapted to be lifted from and inserted into saidbearings, a plurality of chain driving pulleys carried rigidly by saidshaft, a clutch member carried by one of said chain driving pulleys, atransmitting gear mounted on said shaft and provided with a clutchmember adapted to interlock with the clutch member of said chain drivingpulley, and to be held in the interlocked position by said frame whensaid shaft is seated in its bearings, a driving shaft journaled nearopposite ends in bearings in the lower portion of said frame, saiddriving shaft carrying a driving pulley and a transmitting gear, saidtransmitting gear being in engagement with the transmitting gear on saiddriven shaft, and means to lock said driving shaft against endwisedisplacement.

5. In a mechanism of the character de scribed, a supporting frame, adriven shaft supported at opposite ends in open bearings in the upperportion of said frame, a plu rality of chain driving pulleys and atransmitting gear carried rigidly by said shaft, a driving shaftsupported near opposite ends in bearings in the lower portion of saidframe, a clutch member carried by said driving shaft, a driving pulleycarried by said driving shaft and having a clutch member adapted tointerlock with the clutch member of said driving shaft, a transmittinggear carried by said driving shaft in position to drive the transmittinggear 011 the driven shaft, and means to detachably lock said drivingshaft to position endwise to hold said clutch members in engagement, andto hold the transmitting gear on said driving shaft laterally inposition.

In testimony whereof I have afliXed my signature in presence of twowitnesses.

ADAM BITTER.

Witnesses IVALTER F. MURRAY, C. W. MILns.

